Decorative panel



FIG. 1 shows a perspective view of a decorative panel, the broken lines showing a frame are for illustrative purposes only, and form no part of the claimed design;

FIG. 2 shows a perspective view of the decorative panel shown in FIG. 1;

FIG. 3 shows a front elevational view of the decorative panel shown in FIG. 2;

FIG. 4 shows a rear elevational view of the decorative panel shown in FIG. 2;

FIG. 5 shows a top plan view of the decorative panel shown in FIG. 2, a bottom plan view not being shown as it is substantially a mirror image of the top plan view; and,

FIG. 6 shows a right side elevational view of the decorative panel shown in FIG. 2, a left side view not being shown as it is substantially a mirror image of the right side elevational view. 

The ornamental design for a decorative panel, as shown and described. 